Air-pump.



,side elevation and partly in section.

rnrrrnn snares, Parana orrron;

nAPoLnoN w. nieiin, or xnnsns orrr, MrssoUni.

AHEPHPQMP, i

Patented. Aug. 7, 190a,

Application filed October L, 1904 Serial No. 227.103.

To aZZ whom it may concern;

Be it known that I, NAPOLEON W. DIBLE,

a citizen of the United States, residing at Kansas City, in the county of Jackson and State of Missouri, have invented certain new and useful Improvements in AirPumps, of which the following is a specification. This invention relates to air-pumps, and more particularly to a double-acting airpump for creating a vacuum; and my object is to produce an efficient and reliable pump of this character.

To this end the invention consists in certain novel and peculiar features of construction and combinations of parts, as hereinafter described and claimed, and in order that it may be fully understood reference is to be had to the accompanying drawings, in which L Figure 1 represents a pump embodying my invention, the same being shown parltqly in 1g. 2 represents an enlarged central vertical sectioi of the upper part of the pumpwith the piston-stem broken away.- Fig. 3 is a hori-' zontal section taken on the line 111 HI of Fig. 2.

In the said drawings, 1 designates the body of the pump having its ends closed by caps or heads 2, the relation between the body and the headsbeing preferably a threaded one, as shown. The lower cap or head is provided with a depending stirrup or foothold-'3,

. and the upper one is equipped with a packing cap has or stufiing box 4;. At corresponding sides the heads or caps are provided with enlarge' ments 5, having angular passages 6, enlarged at their upper ends, as at 7, and formed with valve-seats 8 at the lower end of said enlarged portions, the latter also communicating by way of passages 9 with the interior of the pump. 1

. 1O designates ball-valves seated by gravity on seats 8, and 11 screw-plu s closing the upper ends of the passages an limiting the unse'ating or upward movement of the balls.

The enlargement 5 of the lower head or the end of its passage below the ball internally'threaded to receive the threaded end of a tube 12, the opposite end of said tube being formed with. a flange 13, and jour-- naled on said end and held thereon by said flange is an internally-threaded coupling-nutof said tube and said upper enlargement to make the joint therebetweenair-tight. At a suitable point, preferably midway its length, tube 12' is provided with an offsetting-tube 16, having an enlar ement or head 17 for se curing upon said tu e the end of a rubber or equivalent tube, (not shown,) said rubber tube being adaptedto lead to thechamber' from which the air is to be exhausted.

18 designates the piston rod or.- stem, the same being hollow and provided with an airexit opening or openings 19 at or. near its upper end, and mounted on said end 'isa'tubular'handle 20 to conduct the air front-open- ,extends slidingly through the stuffing-box 4, and screwed thereon is a nut 21-, andbfitted upon the stem below the nut isja "washer 22 and a flexible inverted cu --'le,ather- '23; Screwed upon the stem and a washer 2 3 or moreopenmgs 25, establishing communication between the interior of the .pum and said tubular stem. Screwed into the OWGIQ end of said tube is a bolt 26, and fitting upon the same is a flexible cup-leather 27 a Washer 28, and a washer 29, the cup-leather being I W on the pump is operated by grasping its handle and reciprocating the piston, air is drawn alternately throughthe upper-and clam ed firmly between the washers;

lower halves of tube 12 from tube 16, and with each reciprocation air is exhausted through the tubular istonfstem. When the piston moves upwar as illustrated in 21% the suction of the air through thelower of tube 12 raises the ball-valve 1-0 of the charge the pump below the piston. At the lower enlargement from its seat, so as '.a

same time the compression of the air in the upper part of the pump holds the upper ballval've 10 down upon its seat and causes the expansion of the on 27 and the collapse of estaP" aimosPhere Y' PWmg he; course" 7 .70 iilgs 19 to the atmosphere. The piston stem a pin h it. cup-leather firmly between said washer'and is a tube 24, provided withlo'ne 9 the inverted oupt at is to say, causes, the. 3 wall of the inverted cup to bend inward, as;

shown, so that the air above the pistonma'y thelower.

'. of the object of the invention, and which, furthermore, is of simple, strong, durable, and comparatively inexpensive construction.

-Ha'ving thus described the invention, what I claim as new, and desire to secure by Letters Patent, is-

1. A double-acting pump, comprising a body portion, passages communicating with each end of said body portion, movable valves closing said passages, a hollow piston-stem ex tending slidingly through one head of the body and communicating with the atmosphere at its u per end, a perforated tube secured on the ower end of said piston-stem with its perforations establishing communication between said stem and the interior of the pump, an inverted flexible cupleather movable with the stem, above the perforated part of said tube, and a flexible cup-leather movable with the stem, below the perforated part of the tube.

2. A double-acting pump, comprising a body portion, passages communicating with each end of the body portion, movabl'e valves closin said passages, a hollow piston-stem exten in slidingl through one head of the body an provide with one or more perforations at its upper end, a tubular handle secured upon said upper end and having its bore registering with said perforations, aperforated'tube secured on the lower end or" said piston-stem with its perforations establishing communication between said stem and 4 ,forations'below said stem, a nut screwed upon the stem above said tube, a washer fit- 6 ting on the stem below the nut, an inverted flexible cup-leather clamped upon the stem between the washers, a bolt screwed into the lower end of said tube, washers upon the bolt and between its head and the 'lower end of 6 said tube, and a flexible cup-leather clamped between the washers.

i. A double-acting pump, comprising a body portion provided with a foothold, passages communicating with each end of said 7 body portion, movable valves closing said passages, a hollow piston-stem ext'endin slidingiy through one head of the body and communicating with the atmosphere, at its upper end, a perforated tube secured on the 7 lower end of said piston With its perforations establishing communication between said stem and the interior of the pump, an inverted flexible cup-leather movable with the stern above the perforated part of the tube, 8 and a flexible cup-leather movable with the, stem below the perforated part of the tube.

In testimony whereof I afiix my signature i in the presence of two witnesses.

NAPOLEON W. DIBLE.

Witnesses:

H; C. Ronenns, G. Y. Tnonrn. 

